| abstract |
The present invention is a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, a raw material combining process for obtaining an aqueous mixture containing Mo, V, Sb, and Nb, and aging the aqueous mixture at more than 30 ° C. a drying step of drying the aqueous mixture to obtain dry powder, and a calcining step of calcining the dry powder to obtain the oxide catalyst, in the raw material combining step and/or aging step, ( Precipitation of Nb is promoted by performing at least one operation selected from the group consisting of I) to (III). According to the present invention, an oxide catalyst having a high yield of unsaturated nitrile can be obtained, and the oxide catalyst can be produced in a relatively short time without introducing a complicated process and changing equipment. |